Synthesis and Properties of High Temperature Resistant Epoxy Resin Containing Carborane

Carborane epoxy resin (DECB) was synthesized with 1, 2-bis (4-hydroxy phenyl) -o-carborane (BHCB) by one-pot method. The curing product was prepared by using commercially available epoxy resin AG-80, DECB and tetrafunctional epoxy(TEPZ)as curing agent. DSC test was used to explore the curing reaction kinetics of the composite system, and the curing conditions were determined according to FT-IR. Rheological tests show that a small amount of DECB can further expand the processing window of the complex system. The viscosity of the complex system is lower than 10 Pa•s for 2 h at 150 ℃, which is convenient for processing and molding. Dynamic mechanical analysis (DMA) show that the addition of DECB has little effect on the glass transition temperature(Tg), which remains above 278 ℃. Thermogravimetric analysis (TGA) show that the char yield at 800 ℃ could significantly increase with the addition of DECB. The mechanical properties test results show that the addition of large volume structure carborane can increase the rigidity of the cured crosslinked network, and the bending strength of the composite system is up to 142.3 MPa. © 2021, Editorial Board of Polymer Materials Science & Engineering. All right reserved.